Split pulley.



F. B. HUBBARD.

SPLIT PULLEY.

APPLIOATION FILED JAN. 20, 1909.

925,701 Patented June 22, 1909.

ATTEST INVENTOR 77f Frank KHubbard J a mum BY MW ATTYS,

"UNITED STATES PATNT OFICE.

FRANK B. HUBBARD, OF MIDDLEFIELD, OHIO.

SPLIT PULLEY.

Application filed January 20, 1909.

To all whom it may concern:

Be it known that I, FRANK B. HUBBARD, citizen of the United States, residing at Middlefield, in the county of Geauga and State of Ohio, have invented certain new and useful Improvements in Split Pulleys, of which the following is a specification.

My invention relates to improvements in split pulleys, all substantially as shown and described and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a side elevation of the pulley and a cross section of a shaft on which it is mounted, and Fig. 2 is a face elevation thereof. Fig. 3 is a side elevation showing the sections or parts of the pulley open, and Fig. 4 is a detail of fillers or blocks between the ends of the rim as hereinafter described. I

The nature and object of the invention are obvious from the foregoing views. The pulley is constructed of or with two equal sections or halves, A and B, adapted to be clamped upon shaft S and to be opened and removed therefrom and placed thereon with ease and convenience. To these ends each section or part is provided with a flanged hub 2 fashioned at its middle portion with a half round bearing 3 for engagement upon the shaft and provided wit-h flanges 4 at the sides of the hub through'which pass clamping bolts 5 for securing the pulley upon the shaft.

A web 6 is shown at one end of said flanges between opposed spokes 7 of said sections substantially midway to the rim of the pulley, and a portion of said web is integral with each section and spoke and is provided with a transverse hole constituting a part of a hinge with a pin or pintle 8 uniting said parts and completing the hinge. At the other side the flanges 4 have matching ears 9 provided with transverse holes 10 that register and receive a locking pin or key 12 through the same when said sections are closed upon the shaft, Fig. 1.

D and E represent opposed filling blocks adapted to occupy correspondingly shaped recesses 15 in the rim R of the pulley. The said recesses are formed in the ends of said rim sections or portions in line with said flanges and hinge and of such depth relatively that when said blocks D and E are removed the pulley sections can be opened on their hinge substantially as wide as seen Specification of Letters Patent.

Patented June 22, 1909.

Serial No. 73,328.

in Fig. 3, so as to make plenty of room to slip the pulley over the shaft. It is desirable, however. notwithstanding the depth of these opposed recesses that the periphery of the pulley be preserved as it were unbroken, and, furthermore, that said recesses should be constructed to receive said blocks with a wedging effect and to conform to said periphery so as to lock rigidly together and make them practically as one piece about their periphery with the pulley rim. To these ends the said recesses are in a sense double in each pulley section at-the meeting ends of the rim thereof, or if the two pulley sections be considered together, there is a single recess on each side with four sides a and b respectively, having their angle at c in about the middle of the rim transversely.

The blocks or fillers D and E have faces a and 5 corresponding to said sides a and b, and are of a size to completely fill and occupy said respective recesses when the parts are assembled and put in place so as to fit with a wedging effect, and a bolt 14. passes through holes centrally in said blocks and locks them together and effectually tightens the rim of the pulley. A dowel pin 15 unites the opposite ends of rim B.

What I claim is:

1. In split pulleys, a two-part pulley having a hinge between the parts at one side of its axis and said parts recessed in their rim portions opposite said hinge to permit opening of the pulley on its hinge and a filling for said recess.

2. In split pulleys, a pulley having two parts hinged together substantially midway between the axis and the periphery thereof and provided with rim sections shortened opposite said hinge, thereby affording room for said parts to open on the side opposite from said hinge and a filling for said shortened portion of the rim.

3. A split pulley in two parts hinged together at one side of the center thereof, and having a recess in the rim of the pulley and a substantially wedge shaped filling member occupying said recess.

I. A split pulley having a flanged hub and a hinge next outside said hub and a rim having a recess in line with the flanges of said hub, and tightening means fixed in said recess.

5. A split pulley having a two-part rim with a recess between the parts of the rim tapered toward the middle from each side sitely disposed blocks conforming to the and a two-part filling locked in said recess. periphery of the rim filling said opening. 10

6. A two-part split pulley having a hub In testimony whereof I aflix my signature with flanges at its sides, a hinge uniting said in presence of two Witnesses. flanges at one side of the hub and a device FRANK B. HUBBARD. locking said flanges together on the opposite lVitnesses: side of the hub, a rim having an opening in E. M. FISHER, line with said flanges and hinge and opp0- F. O. MUssUN. 

